DWARKA INTERNATIONAL SCHOOL
CLASS IV (2017-18)
SCIENCEHALF YEARLY EXAMINATION
Q1 Choose the correct option. (1х5)
(a) Plants in rainforest are adapted to ..
(i) flooding (ii) extreme heat (iii) heavy rainfall (iv)scanty rainfall
(b) Iodine reacts with starch and produces a ______colour.
(i)blue (ii) bluish- black (iii) green (iv) violet
(c) Yaks are adapted to living in..
(i)rainforests (ii) mountains (iii)polar regions (iv) deserts
(d) ______is used when force is applied.
(i) heat (ii) friction (iii) light (iv) energy
(e) Solids can easily be converted into liquids by
(i)freezing (ii)heating (iii) cooling (iv) melting
Q2 Give one word for the following: (1х7)
(a) The space occupied an object - ______
(b)pointed shape of the leaf that helps it to get rid of water - ______
(c) a vast region of land covered with grass and few trees- ______
(d) A relationship in which each member is dependent on other - ______
(e) A force that stops an object in motion - ______
(f) A tool or device that helps to make a task easier - ______
(g) A green coloured pigment present in the leaves - ______
Q3 Fill in the blanks. (1х7)
(i)______energy is used to operate ceiling fan.
(ii)A ______is the natural place where living things live.
(iii)Roots of mangrove trees absorb air directly from the ______.
(iv)Plants that feed on insects are called as ______plants .
(v)______is the lightest state of matter .
(vi)______are the main source of food of polar bears .
(vii)Narrow tubes present in the leaves are called ______.
Q4 Give one example of the each : (1х6)
(a)arboreal animal - ______
(b) aquatic plant ______
(c) insectivorous plant ______
(d) complex machines ______
(e) solid state ______
(f) animals that live in mountains ______
Q5 Define the following terms: (any 5) (1х5)
(a) Solution
(b) Adaptation
(c) Matter
(d) stilt roots
(e) force
(f) muscular force
Q6 Give reasons for the following: (2х5)
(i)Fruits from tree always fall to the ground.
(ii)The colour of the body coat of animals in open grasslands merges with the colour of dry grass.
(iii)Work is not done everytime when the force is applied.
(iv)Croton plant is yellowish or reddish in colour but still it is able to make food.
(v)Water droplets are formed on the outer surface of a steel tumbler.
Q7 Answer in brief: (Do any 10) (2х10)
(i)Which state of matter has definite a definite shape and volume? Give its two examples.
(ii)Which form of energy do we get from sun? Write its two uses.
(iii)What is the difference between total parasite and partial parasite.
(iv)Write any two adaptations of Aquatic Plants.
(v)How are Emperor Penguins adapted to live in the Antartic region?
(vi)Where will these plants will grow best :
1. Thin and broad leaves, a stem with thick bark,shed leaves in winters : ______
2.A smooth stem and waxy leaves with drip tips : ______
(vii)List any two body features that help a fish live in water.
(viii)What happens to the excess amount of food made by the plant.
(ix)What is gravitational force? Give any one example where gravitational force is applied.
(x)Write any two properties of Liquids.
(xi)What are terrestrial animals?Give two examples.
(xii)Differentiate between solids and gases.
Q8 Answer in detail for the following (any 5). (4х5)
(i) a.What happens when wax is heated?
b. What does the following diagram shows?
c. Define Solvent.
(ii) a. The plants that grow in deserts are adapted to what type of climatic conditions?
b. The leaves of cactus are reduced to spines. Why?
c. Write any two adaptations of cactus plant.
(iii) a. List the factors that plants need to make food?
b.Explain the process of Photosynthesis.
c. Make a well labelled diagram to show the process of photosynthesis.
(iv) a. What are insectivorous plants? Give eg.
b. Why does a dodder plant kill the plant on which it grows?
c. Give 2 examples of any two food items according to their edible part.
1. roots-
2. stems-
(v) a. List any two body features that help polar bear to live in the polar region.
b. How do the following features of camels help them to adapt in desert?
1. Eyelashes
2. nostrils
c. How are camels able to survive without food for many days?
(vi) 1.Write the difference between simple and complex machine.
2. Can you imagine our world without machines. Justify your answer.
3. Name the form of energy used in:
a. geyser c. cooking food
b. rolling rock d. flowing water